There is some doubt on the point; but a contemporary and intimate friend, Luca Pacioli, speaks of his "ineffable left hand"; all the best of his drawings are shaded downward from left to right, which would be the readiest way for a left-handed man; and his habitual eccentric practice of writing from right to left is much more likely to have been due to natural left-handedness than to any desire of mystery or concealment.
This underlying biology allows us to understand the way in which left handedness has been treated in history.
I have never been taught any specific ways to compensate my left handedness.
These artificial composites exhibit the unusual left-handedness, i.e. simultaneously negative permittivity and negative permeability.
But at times in history, left-handedness was thought to be a malady in need of curing (and in some parts of the world still is).
